(informal American) to keep something for oneself and use it without sharing, to selfishly consume something by oneself;
e.g. If he tries to bogart the joint, his friends will take it away from him.
(verb)
to bully someone, to act aggressively, cruelly, or threateningly towards them, to treat them insultingly, or to force or coerce them into doing something against their will;
e.g. They tried to bogart her into going with them, but she stubbornly refused.